Englishfor English speakers
explanation
Noun
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An explanation is the words used to tell somebody how to do something or the reason for something.
The explanation was long and drawn-out.
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An explanation is the cause of something.
The explanation for his bad mood was a lack of sleep.
module
Noun
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A module is a part of a system. It can often be changed at any time.
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In computing, a module is a section of a program.